Ammonium nitrate salt deposits

Figure 4-27. Ammonium nitrate salt deposits in the inlet of a nitrous gas axial compressor.

In the method outlined above it is particularly difficult to utilize the spent acid due to the considerable amount of ammonium nitrate it contains. The usual method in which the nitric acid is recovered by distillation with sulphuric acid and condensation is not practicable since ammonium salts are deposited in the retorts, distillation columns, pipes, valves etc. 

Braude states, that the salts of magnesia are mostly soluble in water, and bitter they are all soluble in hydrochloric acid their aqueous solutions are precipitated by potassa and soda, the precipitate, being soluble In hydrochloric, nitric, and sulphuric acids, and in hydroohlorate, nitrate, and sulphate of ammonia. Ammonia only throws down part of the magnesia, and forms a double salt, and carbonates of potassa and soda only throw down part of the magnesia, except the solution be hentad, when pearly the whole is precipitated. Chloride of ammonium redissolves tiro deposit, and when previously added to the magnesian solution, no precipitate ensues on adding the alkaline carbonates, unless the liquor be warmed The bicarbonates of von. ir. 

The Spirit of the World, the Embodied Alkali, is in the Ammonium (NH4) radical. This is often called Sal Ammoniac and is deposited as rain, snow, dew and hail over the Earth. It is carried in the water as the Salt of Dew or ammonium nitrate (NH4NO3) at about 0.5 to 4 grams per ton of rain. 

Ammonium nitrate, NH4NOa.—The nitrate can be prepared by the general methods applicable to the ammonium salts. It is also produced by heating the nitrate of an alkali-metal with ammonium sulphate at 160° to 200° C., the fused ammonium nitrate being separated from the solid alkali-metal sulphate by centrifuging.11 Another method consists in cooling a concentrated solution of sodium nitrate and ammonium sulphate to —15° C., sodium sulphate being precipitated. On evaporation of the mother-liquor, most of the sodium sulphate is deposited addition of nitric acid to the clear solution causes crystallization of the ammonium nitrate.12 When sodium nitrate is... 

One will note the high mole percentage of oxidizer needed to balance this reaction which corresponds to a high weight percentage of inter-pore oxidizer salt deposited in the overall composite. The resorcinol-formaldehyde/ammonium nitrate (RFIAN) reaction shown... 

N 36.83%, OB to C02 -42.1% colorless needles from ether nip 38° d 1.243 at 49/4° RI 1.4616 at 48,6°. V sol in cold w, ale, chlf and benz less sol in eth and still less sol in petr eth. Can be prepd by nitrating n-methyl-urethane with abs nitric acid. The resulting soln of methyl nitrourethane is drowned in w, neutralized with Na carbonate, and extrd with eth to remove methyl nitrourethane. On passing ammonia gas thru the eth extract, a white ppt of the ammonium salt of methylnitramine is deposited and sepd by filtration. It is disd in ale and boiled to drive off the ammonia, and... 

Silver nitrate in ammoniacal solution may be completely reduced to silver by aqueous arsenious oxide. The reduction is hindered by the presence of ammonium sulphate, owing to the decrease in concentration of the hydroxyl ions 5 neutral salts such as sodium sulphate or sodium nitrate have no effect. Similarly, auric chloride may be reduced to gold.6 At 20° C. an aqueous solution of vitreous arsenious oxide reacts 4 to 5 times as rapidly as an aqueous solution of the octahedral form 7 the greater rate of dissolution in water of the former variety has been mentioned (p. 137), but from supersaturated solutions of the two forms there is no appreciable difference in the rates of deposition. The explanation of the inferior reducing power of the crystalline variety may be that there exist anisotropic molecules which only slowly lose their anisotropic properties. An ammoniacal solution of arsenious oxide heated with cupric sulphate in a sealed tube at 100° C. causes reduction... 

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